Golgari Swamp-Lurker

When Golgari Swamp-Lurker enters the battlefield, sacrifice it unless you control a Golgari Guildgate
Purge-Whenever you sacrifice a creature, you may put a +1/+1 counter on Golgari Swamp-Lurker
Golgari reanimation sages are experts at taking the unliving, and making somthing MUCH worse.